Carbureter.



R. T. 'HABBIH'GTR GARBUBBTER.

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QQZQQ. Pawn July 13, 1909.

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NORMAN T. I'IARRINGTON, OF LANSING, MICHIGAN.

CARBURETER.

Specification of Letters Patent.

Patented July 18, 1909.

Application led January 27, 1908. Serial No. 412,834.

To all whom lit may concern. v

Be it known that I, NosniiN T. Hausmerrox, a citizen of the United States of Anterica, residing at Lansing, in the county of Ingham and State of Michigan, have invented certain new and useful Improvements in Carbureters, of which the following is a specication, reference being had therein to the accompanying drawings.

lhe invention has special reference to the construction by which 'the carbureter may be quickly adjusted for operation under varying conditions.

Tothis end the invention consists in the controllingmeans for the auxiliary or bypass air valve, and, further, in the peculiar construction, arrangement and combination of parts as hereinafter set forth.

ln the drawing the figure is a vertical longitudinal section through the carbureter.

M y improvement is applicable to various types of carbureters, but, as shown, A is the tube or casing having a double taper through which the air to be carbureted is drawn, and B is the nozzle for the introduction of the liquid fuel, having its point of discharge in proximity to the point of greatest contraction .in the tube A. It has been found in the operation of carbureters of this type that the passage-of air through the double tapering tube will develop a partial vacuum at the discharge end of the oil nozzle which will cause the injection of oil into the air current, and it has also been demonstrated that within certain limits the discharge of oil is substantially proportional to the velocity of the air current. Thus a uniform quality of explosive mixture is obtained with varying quantities according to the demand ofthe engine. It is not however possible to )ass through the restricted portion of the tu e A in a given time interval as large a volume of air as is sometimes necessary to meet the delnands of the engine, and an auxiliary air valve is provided to admit additional air into the large portion of the conduit A beyond its point of greatest restriction. This valve is normally held closed by a spring pressure or other resistance and only openswhen the pressure in the tube A is reduced below atmosphere.v It is the particular object of the present 1nvention to provide means for controlling the automatic operation of this auxiliary valve so as to produce a more uniform quality of explosive mixture under varying demands of the engine than has been heretofore accomplished. Furthermore, itis an object to render the apparatus readily adjustable to meet the special conditions of an individual engine. Thus if the limits of variations in the demand of the engine are known the carbureter may be quickly adjusted to operate uniformly within these limits, this being accomplished by the following construction: C is the auxiliary valve, which is seated at I) within a conduit E, which comn'iunicates at F with the casing A. H is a spring of variable resistance which, as shown, comprises a `llat spring bar arranged outside of the casing E and contacting with the end of the stem I ol' the valve, this stem projecting through an aperture J in the casing. The spring H is anchored by attachment to the casing E, and preferably to a project-in g arm K thereof, but the arrangement such that the length of the free portion of the spring may be varied. This, as shown, is accomplished by a slidable yoke L, having,r forks L` and L3 which embrace the arm K and spring Il, and the yoke is secured in different positions of adjustment by a shoe L and a set screw M.

IVith this construction it is evident that a very slight reduction in pressure in the conduit A will cause the opening of the valve C, but the increase in resistance, due to the tensioning of the spring, will limit the degree of opening. The ratio of the increase may be varied by an adjustment in the length of the s Jring, which, as described, is e'ected by sliding the yoke L along the arm.

W' hat I claim as my invention is: j

1. A. carbureter comprising a mixing conduit, a conduit connecting laterally with said mixing conduit and having' a valve seat therein, an auxiliary air valve engaging said seat, a stem for 4said valve passing out through an aperture in said conduit, a vspring for opposing movement of said stem, being released from tension when said valve is seated, and means for adjusting the length of said spring to vary its tension.

2. A carbureter comprising a casing containin(r a mixing conduit and an auxiliary air inlet passage, a valve controlling said auxiliary air inlet having its stem passing out through an aperture in said casing, a llat spring arranged in the. path ofsaid stem, an arm on said casing to which said spring` is secured and a yoke adjust-able on saidl arm and bearing against said spring for changing the length thereof.

In a carbureter, the combination with a easing, of an auxiliary air valve, a stem -011 said valve having its outer end free :md passing out through said easing, a. spring Contacting with the outer end of said stem, md means for adjusting the length of said spring to offer variable resistance to the same degree of movement of said valve.

4. in a carbureter, the combination with a easing, 0f an auxiliary air valve, a stem in said valve passing out through said easing, a, guide 0n said 'easing for the Valve. ste-ni, L

spring contacting with the outer end of said stem, mid means for adjusting the length of said spi-ing to oir'er variable resistance to the saine degree of movement of said Valve. l5 ln testimony whereof l :illix my signature in presence of two witnesses.

NORMAN T. HARRINGTON.

Vitiiesses NELLIE hiNsELLA, JAMES P, BARRY.` 

